Similar to various other bugs in this area, some tanh implementations
do not raise the underflow exception for subnormal arguments, when the
result is tiny and inexact. This patch forces the exception in a
similar way to previous fixes.
Tested for x86_64, x86, mips64 and powerpc.
[BZ #16520]
* sysdeps/ieee754/dbl-64/s_tanh.c: Include <float.h>.
(__tanh): Force underflow exception for arguments with small
absolute value.
* sysdeps/ieee754/flt-32/s_tanhf.c: Include <float.h>.
(__tanhf): Force underflow exception for arguments with small
absolute value.
* sysdeps/ieee754/ldbl-128/s_tanhl.c: Include <float.h>.
(__tanhl): Force underflow exception for arguments with small
absolute value.
* sysdeps/ieee754/ldbl-128ibm/s_tanhl.c: Include <float.h>.
(__tanhl): Force underflow exception for arguments with small
absolute value.
* sysdeps/ieee754/ldbl-96/s_tanhl.c: Include <float.h>.
(__tanhl): Force underflow exception for arguments with small
absolute value.
* math/auto-libm-test-in: Add more tests of tanh.
* math/auto-libm-test-out: Regenerated.
* sysdeps/i386/fpu/libm-test-ulps: Update.
2001-06-19 Andreas Jaeger <aj@suse.de>
* sysdeps/ieee754/ldbl-128/s_tanhl.c: New file.
* math/libm-test.inc (tanh_test): Test for 2^-56.
* sysdeps/ieee754/ldbl-96/s_tanhl.c (__tanhl): Make sure result
equals argument when x < 2^-55.
Patches by Stephen L. Moshier <moshier@na-net.ornl.gov>.
Patch by "Hasbullah Pit (sebol)" <sebol@ikhlas.com>.
2001-05-14 Andreas Jaeger <aj@suse.de>
* locales/ms_MY: Fix entries for Tue and Wednesday.
Patch by "Hasbullah Pit (sebol)" <sebol@ikhlas.com>.
Joseph Myers
Richard Henderson
Andreas Jaeger
Ulrich Drepper